Heating coil



Jan. 30, 1923. 1,443,536

A. HOLMQUIST. HEATING COIL.- FILED Nov 8, 1920. 2 SHEETSSHEET I Hi] I 1['4 A I 5 w Jan. 30, 1923. 1,443,536

' A -v HOLMQUIST.

HEATING COIL.v FILED Nov. 8. 1920. 2 SHEETS'SHEET 2I/[IIIIIIIIIIIIIIIIIIIIVIII/III} i f IIIIIIIIIIIIIIllllllllllllmllllgllal Patented den. 3%, i923.

AUGUST HOLIVIQUIST, OF HOOPESTON', ILLINOIS, ASSIG'NOR 'I'O SPRAGUECANNIN'G- MACHINERY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OFILLINOIS.

HEATING COIL.

Application filed November 8, 1920. Serial No. 422,428.

To (ll? 103mm it may concern:

Be it known that I, liusnsr Homreorsr, a citizen of tie United States,residing at Hoopeston, in the county of Vermilion and State of Illinois,have invented new and useful Improvements in Heating Coils, of which thefollowing is a full, clear, concise, and exact description, referencebeing had to the accompanying drawing, forming a part of thisspecification.

My invention relates to: heat transferring apparatus, and moreparticularly to a heating coil for reducing tomato pulp and the like.

One of the objects of my invention is to provide an improved heatingcoil which will not burn the pulp, which will quickly reduce the pulpwith a minimum steam consumption, which will uniformly heat the pulp andwhich will stir it while it is being heated.

Further objects will appear from the detailed description to follow andfrom the appended claims.

In the drawings in which an embodiment of my invention is shown- Fig. 1is a vertical axial section of a pulptank and heating coil;

Fig. 2 is aplan view of the heating coil;

Fig. 3 is an axial section through the steam inlet and exhaust; and

Fig. 4 is a section on the line 4- 1- of Fig. 1.

The construction shown in the drawings comprises in a general way apulp-tank 10 for containing the pulp to be reduced, a helical steam coil11 to which steam is supplied, and mechanism 12 for imparting a stirringmotion to the heating coil 11.

The helical heating coil 11 is mounted so that it has a sort of wobblingmotion and so that in addition it is free to rotate about its own axis.

For the purpose of mounting the helical coil 11 for the desiredmovement, it is mounted on a hollow central post 13, which central posthas a ball and socket connection at 1a with the bottom of the tank.

This central post 13 is mounted so that its axis describes a conicalsurface, with its apex at the center of the ball and socket joint at 14,and is also mounted so that the post can rotate about its own axis, nomatter in what position it is.

For causing the axis of the post 13 to de' scribe a conical surface, thepost is provided with a short downwardly extending arm 15, which has aball and soclret'connection at 16 with the rotatable drive gear 17. Thisball and socket connection at 16 with the bevel gear 17 causes the balljoint 16 to describe a circle, and hence causes the upper end of thepost 13 to describe a circle, and

causes the axis of the post 13 to describe a conical surface. At thesame time, the post 13 is free to rotate about its own. axis, and

as a matter of fact will becaused to rotate about its own axis by the.resistance of the pulp in the tank 10 acting on the helical coil 11.Thus while there is no positive control for the rotation of the post 13it is nevertheless free to rotate and will rotate, the amount of thisrotation varying with the consistency of the pulp which is being heated.The bevel gear 17 may be driven by a bevel pinion 18 let ports 22communicate with the heating coil 11 by an upwardly extending passage 3)which leads tothe upper port/lon 24 (Fi of the helical coil 11.

In order to provide for the escape of the water of condensation in thehelicalcoil 11,

no matter in what position the post may be, the post is provided with aseries of exhaust ports 25, which communicate with'the annular exhaustpassage 26, leading to the exhaust pipe 27 (Fig. 1). The exhaust ports25 are in communication with the lower portion of the helical coil 11through an up wardly extending annular passage 28.

In order to utilize the heat of the steam which is applied to theheating coil as fully as possible, I make a sort of compound 0011, thatis, I make one part of the coil of larger diameter or bore than theother, the steam being first supplied to the part of thecoil of smallerbore, and passing to that part of the coil of greater bore. As shown inFig. 2 the steam passes first to the coil portion 28 of the smallerdiameter and then to the coil portion 29 of larger diameter, the twoportions being connected by a reducing coupling 30.- The steam is at acompare mounted on a shaft 19, which shaft in turn tively high pressureand temperature in the coil portion 28, but due to condensation and alsoto expansion on entering the larger coil portion 29 the pressure andtempera ture drop so that the steam in the coil portion 20 is at arelatively low temperature and the heat is fully utilized. This makingoi the coil in portions of diiierent diameters also enables the coil tohe made lighter as the pressure is greater in the smaller portion of thepipe which is better adapted to stand the bursting strain.

In order to enable the coil to be readily removed from the tank forcleaning and the like, I provide a readily detachable connection betweenthe ball and socket joint 14: and the coil by means of a long bolt -31(Fig. 3) which extends down inside of the post 13 an (i is threaded intothe ball portion 2-1 of the ball and socket joint, the upper end of thislong bolt bearing on the upper end of the post to form a tight joint at32 and where the post separates when the coil removed.

Having thus described my invention what I claim as new and desire tosecure by Letters Patent of: the United States is:

1. An agitating heating coil construction comprising a. heating coil, acentral post on which said coil is mounted, and means for mounting saidcentral post comprising a ball and socket joint.

2. An agitating heating coil construction comprising a helical coil, andmeans for mounting said helical coil so that its describes a. conicalsurface, and so that the coil can revolve about its own axis.

8. An agitating heating coil construction comprising a heating coil,apost on which said heating coil is mounted, means for mounting saidpost comprising a ball and socket joint and means for supplying aheating medium to said coil through saic bah and socket joint.

l. in agitating heating coil construction comprising a heating coil, apost on. which said heating coil is mounted, means for mountin said postcomprising a ball and socket joint, and means for supplying a heatingmedium to said coil and withdrawing it from said coil through said balland socket joint.

5. An agitating heating coil construction comprising a. heating c il, aro-tatabl mounted hollow post on which said heat ing" coil is mounted,a. ball and socket joint for mounting said post, and me: for dotachablysecuring the post to said ball and socket joint.

6. An agitating heating coil construction compri a heating coil, 9. poston which said heating; coil is monnteiii, means for mounting said postcomprising a ball and socket joint, and means for driving postcomprising a rotatable member having a ball and sock t connection withsaid post, whereby said coil is free to rotate about its axis as it isdriven by said rotatable memher.

7. An agitating heating coil construction comprising a. heating coil,and means for mounting said heating coil comprising a ball and socketjoint, said ball and socket joint comprising a ball member having inletand exhaust ports therein, said socket memher having inlet and exhaustpassages in registration with said inlet and exhaust ports respectively.

In witness whereof, I have. hereunto subscribed my name.

AUGUST HQLMQUIST. Witnesses Holman C. STEWART, JOSEP B. KERR.

